The trouble with seasonal sports is that you've literally got to follow the seasons around the globe if you want to live your passion year-round. That, or let technology find a way to bring you your outdoor thrills indoors - like the Snowtunnel does. We've seen Dubai's lavish indoor ski slopes in the middle of the desert - now, this Aussie invention gives snowboarders the chance to cut a neverending icy edge for a fraction of the cost it takes to operate other indoor ski facilities. Sure, it'd be nothing like the feeling of dropping in, carving and jumping your way down a mountain slope, but the Snowtunnel looks like its own kind of fun.